7
1 9 2 5 R o u t e 5 1 , J e f f e r s o n H i l l s , P A ,
1 5 0 2 5
8 0 0 . 2 4 5 . 1 6 5 6 w w w . l e s k e r . c o m
Step 1
. Press the set point switch. This redirects the meter movement to be controlled by the
potentiometer adjustment.
Step 2.
While pressing the set point switch, adjust the set point adjustment until the meter
movement indicates the vacuum level at which that you’d like the relay to activate.
Step 3
. Release the switch.
The relay may turn on or off a device depending on how it is wired to the type C contacts. Below is a
description of type C contacts:
1.
Common – The common connection of a switch or circuit.
2.
N.C. – Normally closed. This means that above the set point value there is a current path
between the common and the N.C. terminal. Put another way the switch is “ON” between
these 2 terminals. At the set point value and below (higher vacuum, lower pressure) the
connection is open. Put another way, the switch is “OFF” between the common and the
N.C. connection at higher vacuum (a lower vacuum reading).
3.
N.O. – Normally open. This means that above the set point value there is no current path
between the common and N.O. connection. Put another way the switch is “OFF” between
these 2 terminals. When the vacuum indication goes below the set point value (higher
vacuum, lower pressure) the current path closes. Put another way the switch is “ON”
between the N.C. and N.O. connections at absolute vacuum readings below the set point
value.
Section 6: Analog Out
This gauge is equipped with an analog voltage output to indicate the pressure level. This analog
output uses voltage to simply communicate with PLCs, PCs and other control systems. Below are
some sample readings:
Volts
millitorr
mbar
Pa
0.10
2
.003
0.3
0.50
10
0.13
1.3
2.20
50
.067
6.7
3.30
100
.133
13.3
4.05
200
.267
26.7
4.40
300
.400
40
4.55
400
.533
53.3
